Inspired by the comment left for my answer to this question: Can getting the flu shot make you sicker next year?
Providing sources is within the spirit of the site, and something I've tried to do when possible, there are going to be questions based on pure conjecture for which finding a source is non-trivial, if not impossible. I'd assert that this question is one - I've been working on influenza for the better part of a decade, and never even heard this assertion, let alone seen a study that might address it. After some brief Googling for the original belief, and then some Google Scholaring/PubMedding for a source to refute it, I came up with nothing and hit the "Stack Exchange doesn't pay me" limits of my patience.
How are we going to handle these types of questions. For example, if I post "Can taking beta-blockers turn your skin purple?", can we really expect someone to come forward with peer-reviewed literature to refute that? It's both an unstudied problem and attempting to prove a negative.